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XI-2 n___.~.._":~ -6-_ l'\t:~t:r vu I J l.U Basel ine Road (Brighton) are in accordance ,...;+h +hn n 11,.11 l.ll.... .; n+....n+ n.f. 11........11... VI . Transportation. Roads, highways, and bridges should not cause flood prob- lems or increase flood related damages. Transportation should not conflict with the recreational and park use of the corridor without mitigation mea- sures. Bridge crossings of the South Platte River should not cause back- water effects and should have piers and abutments designed to resist erosion by the river. The planning and design criteria for the South Platte River from Chatfield 1) Urban Storm Drainage Criteria Manual Volumes 1 and 2 March, 1969; and as revised from time-to-time Urban Drainage and Flood Control District 2) Stream Stability Investigation South Platte River Chatfield Dam to Baseline Road Michael A. Stevens November 1983 Erosion and Sedimentation. Bed and bank cutting by the River, and related sediment deposition effects should be minimized. Erosion and sedimentation causing activities affect safe flood carrying capacity and therefore should be subject to flood control regulations. 3) Drainage and Flood Control Design Guidelines and Criteria Channels and Hydraulic Structures on Sandy Soil Simons, Li & Associates June 1981 Access Trail. Access to the River should be maintained for operational and maintenance purposes, and to afford ready inspection of problem areas. Such access trails shall, where practical, serve a multi-use function for hiking and running, biking, and non-motorized transportation. 4) Chapter VI Adams County Subdivision Regulations Continuous Linear Boating. Safety and enjoyment of the river should be encouraged by providing for continuous boating. All dams and check dams should have safe boat chutes suitable for the typical boater for river flows up to 1,500 cfs. Use of the river may be restricted by peace officers (as defined by state law) to protect the public safety whenever flows exceed safe limits. Planning Criteria The following criteria are used as general guidelines during this master planning project. Aquatic Life. Means to protect and enhance fishing and all forms of aquatic life should be included in plans. One Hundred Year Design Flood. The 100-year flood will be the basis for all floodplain master planning in the South Platte River Corridor. The one percent criterion means that ramifications of the 100-year flood must always be evaluated as to impact and land use optimization. It does not mean that overbank flooding during the 100-year flood must be eliminated. Birds and Terrestial Wildlife. able for birds and terrestial Enhancement of a riverine environment suit- wildlife should be included in the plans. River Flow Management. multi-purpose river to fines of Colorado law. The South Platte River flow should be managed as a optimize the many uses of the river within the con-